Just curious what people are seeing. We are backing up about 150TB of footage, and getting about 265MB/sec. Just curious if that is egregiously slow or about what is to be expected (this is my first extended LTO8 setup). We are doing a TB3 GRaid XL on Mac to Windows P5 server via 10GbE, so I expect some overhead, but I wasn’t sure how close to the spec 360MB/sec people were able to get in practice (especially with video data).
Transfer speeds of 360MB/s are using a full height LTO-8 drive. Some vendors incorrectly quote this figure, however for half height drives the speed is 300MB/s. You should see ~305MB/s with most video data. With compression enabled, files like ARI, DPX and CINE will transfer 5 to 10% faster.
So given the platform to platform and all the other overhead I’m probably not going to see a huge difference. I’ll take a look at block size and see if that make a notable difference on the next run (finishing a 75TB job this week, and then starting an 85TB job).
I’ve used Yoyotta to backup to a Tandberg half height SAS LTO drive. Done nearly a Petabyte so far. Done backups from 4-bay and 8-bay TB3 RAIDs, 2.5″ SSDs, NVMe SSDs, 2xSSD RAIDs and fo course just drives. So, devices with read speeds from 150 MB/s to 1,500 MB/s.
Backup speed doesn’t exceed 300 MB/s. Its faster with a small number of large files (Sony Venice) compared to a large number of small files (Arriraw).
I usually do Quick verify not full verify. If verify is a must, I call back the tapes a few months later when my machines are free, and do a verify run.